Q. No.Protophloem differs from metaphloem in having:
1. companion cells present
2. dead sieve tube elements
3. narrow sieve tubes
4. lignified phloem fibers
1. companion cells present
2. dead sieve tube elements
3. narrow sieve tubes
4. lignified phloem fibers
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The incorrect statement regarding epidermal tissue system in angiosperms would be:
1. It comprises of epidermal cells and stomata but not the appendages such as trichomes
2. It is the outermost layer of the primary plant body forming a continuous layer
3. It is usually single layered
4. Cells are parenchymatous with a large vacuole
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The meristem that helps grasses regenerate parts removed by the grazing herbivores is the:
| 1. | Shoot apical meristem | 2. | Root apical meristem |
| 3. | Intercalary meristem | 4. | Lateral meristem |
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All the following are true for trichomes except:
| 1. | they are usually unicellular |
| 2. | they may be branched |
| 3. | they may be secretory |
| 4. | they help in prevention of water loss due to transpiration |
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Mesophyll cells present in the ground tissue of leaves are:
1. chloroplasts lacking thin walled cells
2. chloroplasts containing thick walled cells
3. chloroplasts containing thin walled cells
4. chloroplasts lacking thick walled cells
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Open vascular bundles:
| I: | have cambium present between xylem and phloem |
| II: | possess the ability to form secondary tissues |
| III: | are rare in dicotyledonous stems |
1. Only I and II are correct
2. Only I and III are correct
3. Only II and III are correct
4. I, II and III are correct
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All the following are examples of secondary or lateral meristems except:
| 1. | Fascicular vascular cambium | 2. | Intercalary meristem |
| 3. | Interfascicular meristem | 4. | Cork cambium |
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In conjoint type of vascular bundles:
| I: | xylem and phloem are jointly situated on the same radius of vascular bundles. |
| II: | xylem is usually located on the outer side of the phloem. |
| 1. Only I is correct | 2. Only II is correct |
| 3. Both are correct | 4. Both are incorrect |
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Casparian strips are:
| 1. | waxy deposition of suberin on only the tangential walls of the endodermal cells |
| 2. | waxy deposition of suberin on only the radial walls of the endodermal cells |
| 3. | waxy deposition of suberin on both tangential and radial walls of the endodermal cells |
| 4. | waxy deposition of lignin on both tangential and radial walls of the endodermal cells |
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In a dicot root, the number of patches of xylem and phloem are usually:
| 1. | 2 to 4 | 2. | 4 to 6 |
| 3. | 6 to 8 | 4. | 8 to 10 |
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